No Refund for money incorrectly collected

Poor Service Delivery and lack of action from Wesbank to refund money incorrectly collected. Initially they sent an sms to collect mid month, despite us personally going to the bank and letting them know that salaries won’t be paid by then they still attempted to deduct. 2ndly on a different day they deducted twice without any communication, we requested for a refund and till date no sms acknowledging the refund.